Patents by Inventor Eugen Velker

Eugen Velker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of dihydroxypolyurethanes and the use thereof as adhesives or as raw materials for adhesives
    Patent number: 4240861
    Abstract: The instant invention is directed to a process for the preparation of dihydroxypolyurethanes containing carboxyl groups and chemically fixed ionic groups, comprising reacting(A) dihydroxypolyesters having molecular weights of from 600 to 8,000;(B) organic diisocyanates;(C) compounds containing carboxyl groups and groups having a higher isocyanate-reactivity than said carboxyl groups; and(D) compounds containing ionic groups and isocyanate-reactive groupswherein the products of said process contain from 0.01 to 1.0%, by weight of carboxyl groups and from 0.1 to 10 milliequivalents of ionic groups per 100 g of polyurethane.
    Type: Grant
    Filed: May 17, 1979
    Date of Patent: December 23, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Meckel, Horst Muller-Albrecht, Manfred Dollhausen, Eugen Velker
  • Process for the production of polyisocyanate-polyaddition products using a multi-phase reaction flow tube
    Patent number: 4119613
    Abstract: This invention relates to a continuous process for the production of polyisocyanate polyaddition products using a multi-phase reaction flow tube as reactor.
    Type: Grant
    Filed: August 31, 1977
    Date of Patent: October 10, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Artur Reischl, Henning Klussmann, Eugen Velker
  • 2-Methylene propane phosphonic acid esters and their copolymer with acrylonitrile
    Patent number: 3935174
    Abstract: 2-METHYLENE PROPANE PHOSPHONIC ACID ESTERS AND THEIR COPOLYMERS WITH ACRYLONITRILE ARE THE OBJECTS OF THE INVENTION. The fibers produced from the copolymers are flame-resistant and show increased thermal stability, improved affinity for dyes and fastness to light. The copolymers of acrylonitrile and 2-methylene propane phosphonic acid esters - in addition to other comonomers - are produced by polymerizing the monomers in solution or - preferably - in an aqueous suspension or emulsion. Formed articles, such as fibres from said copolymers can be prepared by spinning a solution of the copolymer in an organic solvent p.i. in dimethyl formamide.
    Type: Grant
    Filed: August 20, 1974
    Date of Patent: January 27, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eugen Velker, Francis Bentz, Gunther Nischk